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Increasingly, I'm liking the AN drivers better. Better value IMO here in North America. However, shipping may be rather expensive to Australia as they are much heavier than the comparable fostex drivers so you will have to look into that.

i see wagneronline.com.au in Aust. has some options for efficient full range speakers but not audio nirvana. although i am sitting here listening to Yes’s Keys to Ascension as loud as i would ever have listened with our Pioneer class d theatre amp with 20 times more watts. the efficiency of the b & w 706 s2 speaker are specified as 89dB from memory. both amps sound quality is good in my estimation but i feelimagine the valve amp sound is more pleasurable. it would be good to compare with other valve amp builds. the shielded signal wires reduced hum a bit, a low level remains which is hardly noticeable i may have to live with.

Thought I would post the voltage measurement for comment. Not 100% sure how to go about it but comments welcome to aid learning.Left measurement before right.

6sn7 triode 1: confusing because I think they have swapped triodes compared to traditional circuits but pin 2 to across cathode R 71.4 and 75.1 v6sn7 triode 2: pin 5 across cathode R 230.9 v and 225v6sn7 heaters: 6.7v both300b: pin 2 plate to end of cathode R group 360v and 360.2vHeaters 4.7 v both

Suggestions on other measurements I should take or better ways to take the measurements welcome. From the circuit should I use different bias points? Pretty happy with the sound but good to know if. Hold be improved. There's a possibility to increase B+ as the tranny allows 380v. I am using the recommended 320v by the pcb supplier but would be willing to give it a try if sonically worthwhile.

After putting in quite a few hours am still mighty impressed with the sound of this amp even though it has been built with budget components. on certain skilfully recorded albums i feel sure there are instruments and nuances in the music i have never heard before when played on my theatre amp.

Ok. I think I may have the tinkering bug so I have removed the pcb from this amp and will attempt to modify it accord to @suncalc and @mwhouston modified monoblock silver/copper dragon. My transformer will only get to 380v and I don't yet have a 5ar4 so I hope a 5u4g will do for a start. Have given the chassis a new coat of paint. I don't have a good reason to change the amp as it sounded great to me so I am hoping the thought that has gone into Matt's design will yield benefits. Have all parts except power and output transformers for the 6as7/12au7 so I hope to start this one this year too.

Ok. I think I may have the tinkering bug so I have removed the pcb from this amp and will attempt to modify it accord to @suncalc and @mwhouston modified monoblock silver/copper dragon. My transformer will only get to 380v and I don't yet have a 5ar4 so I hope a 5u4g will do for a start. Have given the chassis a new coat of paint. I don't have a good reason to change the amp as it sounded great to me so I am hoping the thought that has gone into Matt's design will yield benefits. Have all parts except power and output transformers for the 6as7/12au7 so I hope to start this one this year too.

I sold my “Silver Dragon” twice. First time it got swapped back for monoblocks 6EM7s and had to agree when I came to human voice they were hard to beat.

The SD probably qualifies as international heritage-a bit like Crickets "ashes". The victor gets to own for a while before they have to pass it on to the next victor-go Australia. I would love to listen to music from it but I fear I would fall out of love with mine with its budget parts a shuguang 300b-98s.

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